Shuttle-operating mechanism for sewing-machines.



E. ERICKSON.

SHUTTLE OPERATING MECHANISM FOR SEWING MACHINES. APPLICATION FILED JULY 20. 1914.

1,1 5mm Patented 00t.26,1915.

2 SHEETSSHEET I.

E. ERICKSON.

SHUTTLE OPERATING MECHANISM FOR SEWING MACHINES. APPLICATION FILED JULY 20. 1914.

1,158,036. Patented 0012. 26, 1915.

2 SHEETSSHEET 2.

W W mama,

Jim.

COLUMBIA PLANOGRAPH c0, WASHINGTON, D' t.

EDWARD ERICKSON, OF LYNN, MASSACHUSETTS, ASISIGNOB, TO VICTOR SHOE MACHINERY 00., 015 BOSTON, MASSACHUSETTS, A

GI-IUSETTS.

CORPORATION OF MASSA- SHUTTLE-OPERATING MECHANISM FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented (Pet. 26, 1915.

Application filed July 20, 1914. Serial No. 852,103.

To all whom it may concern.

Be it known that I, EDWARD ERICKSON, a subject of the King of Sweden, and a resident of Lynn, in the county of "Essex and State of Massachusetts, have invented certain new and useful Improvements in Shuttle-Operating Mechanisms for Sewing- Machines, of which the following is a specification.

This invention relates to machines for sewing heavy materialsuch as leather, and refers particularly to that type of such ma chines known as Welt sewing machines.

The object of the present invention is to provide an improved mechanism for operating the shuttle in a machine such as is shown in an application of mine filed December 2S, 1912, Serial No. 739,056.

The invention consists in certain novel features of construction and arrangement of parts which will be fully understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a plan of a portion of a sewing machine illustrating the features of the present invention. Fig. 2 represents a vertical section of same, the cutting plane being on line 22 on Fig. 1. Fig. 3 represents an elevation of the shuttle and its supporting casing, and Fig. 4 represents a horizontal section, the cutting plane being on line 44 on Fig. 3.

Similar characters designate like parts throughout the several figures of the draw ings.

In the drawings, 10 is a revoluble shaft mounted in the bearing 11 in a standard 12 forming a part of the frame 13 of a sewing machine such as that illustrated in my application, Ser. No. 739,056, filed December 28, 1912. The frame 13 has secured thereto a shuttle casing 14 in which is mounted a shuttle 15 having a bobbin recess 16 in one face thereof and a peripheral recess 17 adjacent to the hook 18 of said shuttle. This shuttle 15 is revoluble in the casing 14 and is prevented from accidental displacement therefrom by means of the plate 18 secured to the casing 14 by means of the screws 19. Within the recess 16 is positioned a bobbin 20 adapted to rotate upon a spindle 21 forming a part of the shuttle 15. lThe outer face of the casing 14 has projecting therefrom cars 22 to which is pivoted at 23, a bar 24,

the free end of which extends beyond the casing 14 and has a notch 25 in the upper edge thereof. Secured to the front face of the shuttle casing 14 by means of a screw 26 is a latch 27 adapted to coact with the notch 25 to lock the bar 24in position parallel to the shuttle; 15 as indicated in Fig. 4 of the drawings. i

The bar 24 has parallel openings 28 ex tending therethrough in each of which is mounted a friction member such as the ball 29 pressed outwardly by means of the spring 30 in the opening 28. Behind each spring 30 "is an adjusting member 31 threaded to the bar 24 and adapted to adjust the tension of the spring 30 in well-known manner. When the bar 24 is in the position indicated in Fig. 4 of the drawings, the balls 29 bear against the outer face of the bobbin 20 and create sufficient friction thereon to prevent it from rotating too rapidly. The rapidity of rotation of the bobbin can be regulated by adjusting the tension of the springs 30 by means of the members 31.

The walls of the openings 28 at the mouth thereof are somewhat contracted to prevent the accidental displacement of the balls 29 when the bar 24 is unlocked to move about its pivot to permit of the removal of the bobbin 20. The driving shaft 10 has a gear 32 secured to one end thereof, this gear meshing with the pinion 33 secured to and revoluble with a shaft 34 mounted in bear- 'ings 35 and 36 formed in the standard 12.

One end of the shaft 34 has formed thereon an eccentric 37 having radiating therefrom a crank arm 38 while the opposite end of said shaft is provided with a nut 39 or some similar means for preventing any longitudinal movement of said shaft.

The inner face ,of the eccentric 37 abuts a face 40 formed upon the standard 12 around the bearing 36. The standard 12 is also provided with a bearing 41 in which is revolubly mounted a shaft 42 having an eccentric 43 on one end and a positioning nut or similar member 44 on the opposite end. The eccentric 43 bears against a face 45 formed upon the standard 12 as indicated in Figs. 1 and 2 of the drawings. The shafts 34 and. 42 are parallel as indicated in Fig. 1 of the drawings. The eccentric 43 has formed thereon a crank arm 46 radiating therefrom at the same inclination as the crank arm 38 upon the eccentric 37. These crank arms 38 and 46 have pivotally secured thereto an operating bar 47 provided. with an extension 48 having at its extreme end a lug or projeetion 49 positioned in the recess 17 of the shuttle 15. Interposed between the eccentrics 37 and 43 is a connector 50 each end of which is provided with a strap 51 encircling one of said eccentrics. The width of the straps 51 is equal to the distance of the cranks 38 and 46 from the faces 10 and 45, thus providing a means for positioning the connector 50 and preventing any lateral movement thereof. 7

This makes a very simple construction of shuttle operating mechanism, reducing the parts to a minimum and providing means whereby the shuttle may be revolved by a member coacting with its closed end. In former constructions the shuttle was driven from the open end and the shuttle driving member interfered with the proper operation of the machine. In the present construction the extension 4-8 is positioned at a point where there can be no interference with the operating parts of the machine. By means of this mechanism all dead centers are avoided in the rotation of the shuttle and as a consequence the smooth running of the of a rotatably mounted shuttle; two parallel revoluble shafts; means for rotating one of said shafts; a frame having bearings for said shafts, each bearing having a boss projecting from said frame an eccentric on each .shaft having a crank radiating from its outer face and its inner face abutting the end of one of said bosses, a connector between said eccentrics interposed between said bosses and cranks, and a shuttle operating bar pivotally connected to both cranks.

2. In a sewing machine, the combination of a rotatably mounted shuttle; two parallel revoluble shafts; means for rotating one of said shafts; an eccentric on the end of each shaft having a crank radiating from its outer face; a connector between said eccentrics to cause their rotation in unison; and a shuttle operating bar pivotally connected to both cranks.

3. In a sewing machine, the combination of a rotatably mounted shuttle having a recess; two parallel revoluble shafts; means for rotating one of said shafts; an eccentric on the end of each shaft having a crank radiating from its outer face; a connector be tween said eccentrics to cause their rotation in unison; and a shuttle operating bar pivotally connected to both cranks and having a lateral projection engaging said recess.

Signed by me at 1 Post Ollice Sq., Boston, Mass, this 10th day of July, 1914.

EDWARD ERIGKSON. lVitnesses:

\VALTER E. LOMBARD, EDWARD F. ALLEN.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

